<template>
    <div class="xtx-carousel" @mouseenter="stop" @mouseleave="start">
        <ul class="carousel-body">
            <li class="carousel-item" :class="{ fade: activeIndex === index }" v-for="(item, index) in sliders"
                :key="item.id">
                <RouterLink to="/" v-if="item.imgUrl">
                    <img :src="item.imgUrl" alt="" />
                </RouterLink>
                <div v-else class="slider">
                    <RouterLink v-for="goods in item" :key="goods.id" :to="`/product/${goods.id}`">
                        <img :src="goods.picture" alt="">
                        <p class="name ellipsis">{{ goods.name }}</p>
                        <p class="price">&yen;{{ goods.price }}</p>
                    </RouterLink>
                </div>
            </li>
        </ul>
        <a href="javascript:;" class="carousel-btn prev" @click="toggle(-1)">
            <i class="iconfont icon-angle-left"></i>
        </a>
        <a href="javascript:;" class="carousel-btn next" @click="toggle(1)">
            <i class="iconfont icon-angle-right"></i>
        </a>
        <div class="carousel-indicator">
            <span v-for="(item, index) in sliders" :key="item.id" :class="{ active: activeIndex === index }"
                @click="dotToggle(index)"></span>
        </div>
    </div>
</template>

<script>
export default {
    name: 'XtxCarousel'
}
</script>

<script setup>
import { ref, watch, onUnmounted } from 'vue'

const activeIndex = ref(0)
const props = defineProps({
    sliders: {
        type: Array,
        default: () => []
    },
    duration: {
        type: Number,
        default: 3000
    },
    autoPlay: {
        type: Boolean,
        default: false
    }
})

const toggle = (step) => {
    let temp = activeIndex.value + step
    if (temp < 0) temp = props.sliders.length - 1
    if (temp > props.sliders.length - 1) temp = 0
    activeIndex.value = temp
    start()
}

const dotToggle = (index) => {
    activeIndex.value = index
    start()
}

const stop = () => {
    clearInterval(timer)
}

let timer
const start = () => {
    clearInterval(timer)
    if (props.sliders.length > 0 && props.autoPlay) {
        timer = setInterval(() => {
            console.log("定时器启动了");
            toggle(1)
        }, props.duration);
    }
}

watch(() => props.sliders, () => {
    start()
}, { immediate: true })

onUnmounted(() => {
    clearInterval(timer)
})
</script>

<style scoped lang="less">
.xtx-carousel {
    width: 100%;
    height: 100%;
    min-width: 300px;
    min-height: 150px;
    position: relative;

    .carousel {
        &-body {
            width: 100%;
            height: 100%;
        }

        &-item {
            width: 100%;
            height: 100%;
            position: absolute;
            left: 0;
            top: 0;
            opacity: 0;
            transition: opacity 0.5s linear;

            .slider {
                display: flex;
                justify-content: space-around;
                padding: 0 40px;

                >a {
                    width: 240px;
                    text-align: center;

                    img {
                        padding: 20px;
                        width: 230px !important;
                        height: 230px !important;
                    }

                    .name {
                        font-size: 16px;
                        color: #666;
                        padding: 0 40px;
                    }

                    .price {
                        font-size: 16px;
                        color: @priceColor;
                        margin-top: 15px;
                    }
                }
            }

            &.fade {
                opacity: 1;
                z-index: 1;
            }

            img {
                width: 100%;
                height: 100%;
            }
        }

        &-indicator {
            position: absolute;
            left: 0;
            bottom: 20px;
            z-index: 2;
            width: 100%;
            text-align: center;

            span {
                display: inline-block;
                width: 12px;
                height: 12px;
                background: rgba(0, 0, 0, 0.2);
                border-radius: 50%;
                cursor: pointer;

                ~span {
                    margin-left: 12px;
                }

                &.active {
                    background: #fff;
                }
            }
        }

        &-btn {
            width: 44px;
            height: 44px;
            background: rgba(0, 0, 0, 0.2);
            color: #fff;
            border-radius: 50%;
            position: absolute;
            top: 228px;
            z-index: 2;
            text-align: center;
            line-height: 44px;
            opacity: 0;
            transition: all 0.5s;

            &.prev {
                left: 20px;
            }

            &.next {
                right: 20px;
            }
        }
    }

    &:hover {
        .carousel-btn {
            opacity: 1;
        }
    }
}
</style>